Hypodermic syringe



June 3, 1958 v Q l. TAsH- HYPODERMIC SYRINGE Filed June 1, 1954 IN V ENTOR. flew/v6 7455 Unite rates Pate rrvronnruvnc SYRINGE Irving Tash,Long Beach, N. Y., assignor. of fifteen percent to Joseph A. Rosenberg,Long Beach, N. Y.

Application June 1, 1954, Serial No. 433,589

4 Claims. Cl. 128-218) The present invention relates to hypodermicsyringes and, more particularly, to an improvedsyringe and a needleassembly for the syringe primarily adapted for multiple injections,although suitable for single injections, and a method of administeringsuch multiple injections. Accordingly, an object of the presentinvention is to i provide a hypodermic syringe including a needle havinga point adapted to be inserted into the patient which point is permittedto remain in the patient while successively administering a plurality ofinjections, thereby eliminating the necessity of inserting a needle foreach injection and sparing the patient of the shock, pain, and anxietyexperienced with each needle insertion. f

Another object is to provide such a syringe which facilitates detectingthe insertion of the needle into a vein.

' Another object is to provide such a syringe which greatly reduces thetime required to administer multiple injections, this being an importantfactor where a large a syringe which is Other and further objects willbe obvious upon an understanding of the illustrative embodiment about tobe described, or'will be indicated in the appended claims, and variousadvantages not referred to herein will occur to one skilled in the artupon employment of the inventioninpra-ctice.

In the drawing: I

Fig. 1 is a longitudinal sectional view of a needle assembly inaccordance with the present invention.

Fig. 2 is a longitudinal sectional view of a sealed package used inconnection with the needle assembly.

Fig. 3 is a longitudinal sectional view of the needle assembly and thesealed package, illustrating the same as used to provide a syringe.

Fig. 4 is a side elevational view of a syringe, illustrating anotherembodiment of the invention.

Fig. 5 is a fragmentary perspective view illustrating the needle of theneedle assembly inserted in the arm of a patient before applying thereceptacle for the first injection or between successive injections.

Referring to the drawings in detail and, more particularly to Figs. 1, 2and 3 thereof, a hypodermic syringe and the parts thereof are showncomprising a needle assembly 10 and a sealed package 11.

The needle assembly (Fig. 1) comprises a body portion or plug 12, and ahypodermic needle 14 extending through the plug and having points 15 and16 at the respective ends thereof. The section of the needle formed withthe point 15 extends outwardly beyond the plug a greater distance thanthe section of the needle formed with the point 16, and serves as theportion of the needle which is inserted into a patient. The section ofthe needle within the plug is hermetically sealed therein, the plugbeing formed of rubber, rubber-like material, or

other plastic material which facilitates forming such a is withdrawn.The advantages of this arrangement will be set forth herinafter.

The sealedpackage 11 (Fig. 2) comprises a receptacle 19, herein shown asa tubular glass cartridge having an opening 20 at one end and an endWall 21 at the opposite end, a closure 22 for the opening constructed ofa rubber-like material adapted to be pierced by a needle and self sealthe passageway formed by the needle when the needle is withdrawn, apiston 24 slidably disposed in the cartridge, a liquid 25 to be injecteddisposed in the cartridge between the piston and the closure, andcompressed gas 26 in the cartridge between the piston and the end wall21.

The needle assembly and the sealed package cooperate as a syringe (Fig.3) when the needle point 16 is caused to-pierce the bulb and the closureand extend into the cartridge, whereby the compressed gas acts on thepiston to cause the latter to expel the liquid through the bore of theneedle. When the needle point is withdrawn from the closure and thebulb, the bulb self-seals and encloses the point 16 to maintain the samesterile for further use. The needle assembly shown herein is soinexpensively constructed that it may be advantageous to discard thesame after an injection or 'a series of injections administered to oneperson, rather than to sterilize the same. The sealed package shownherein is of the type which contains a measured quantity of liquidsufiicient for a single injection and thus is discarded after usethereof. However, other types of sealed packages are adapted to be usedin connection with the needle assembly shown herein, for example, thesealed packages shown and described in my copending application forUnited States Letters Patent, Serial No. 433,579, filed June 1, 1954,which matured into Patent No. 2,794,437 on June 4, 1957, are suitablefor such purpose.

In Fig. 4, a needle assembly 10a is shown, which (liffersessentially-from the needle assembly 10, previously described, in thatthe body portion thereof includes a tubular end section 27 formed with acup-like bore for 7 receiving the closure end of the cartridge 11 andaligning the closure with respect to the needle point 16, wherebymanipulation ofthe syringe is facilitated. This tubular section may beformed integral with the plug 12 or may be a separate part securedthereto.

Preferably, the tubular section has recess means for receiving portionsof the bulb 17 when the bulb is more or less flattened while the needlepoint extends through the closure. Such recess means are illustratedherein as side openings through which portions of the bulk are adaptedto extend, whereby manual access to the bulb is made possible for thepurpose to be described hereinafter.

The hypodermic syringe in accordance with the invention is adapted to beutilized to administer injections by inserting the needle point 15 intothe patient, for example, into the arm of the patient, as shown in Fig.5, prior to connecting the needle assembly to the sealed Patented June3, 1958 blood will appear in the bulb 17, whichr is transparent and,accordingly, the needle must be inserted elsewhere into the patient. ifthe bulb 17 is free from blood, the point 15 has been properly insertedand the injection can be administered. Alternatively, in some cases itis desirable to inject the liquid into the blood stream,

whereby a similar determination can be made to assure proper insertionof the point 15'by noticing blood'or the lack of it at the transparentbulb 17 The cartridge is then applied to the needle assembly, as shownin Figs. 3 and 4, and liquid is caused to be injected by the compressedgas acting on'liquid through the piston. When the cartridge has beenemptied or a desired amount thereof has been injected, the needle point16 is withdrawn from the cartridge closure and the bulb, thus causingflow of the fluid to cease and enclosing of the point by the bulb.

In administering multiple injections, the needlepoint 15 is permitted toremain inserted as shownin Fig. 4 and another cartridge is applied tothe needle assembly. While changing cartridges, the bulb encloses the;needle point 16 and maintains the same sterile for further injections.liquid is extremely advantageous where. two or more injections areperformed in succession because time is saved by the single insertion ofthe needle and only one sterile needle is required for the series ofinjections. Also, this method is more, comfortable to the. patientbecause the fear, pain, shock and anxiety attendant with numerousinsertions of the needle are eliminated.

After the injection or a series of injectionshas been completed, theneedle is withdrawn from the patient;

From the foregoing description, it will be seen:. that the presentinvention provides an improved hypodermic syringe including a needleassembly therefor, which: is simple and economical in construction, anda practical, less costly and time saving method of administeringinjections therewith.

As various changes may be made in the form, construction, andarrangement of the parts herein, without departing from the spirit andscope'of theinvention and without sacrificing any of its advantages, itis to be understood that all matters are tobe interpreted as-illustrative and not in any limiting sense.

What is claimed is:

1. A hypodermic needle assembly comprising a body The foregoing methodof administering the' 4 portion, a hypodermic needle extending throughsaid body portion and having apoint at each end thereof, a compressiblebulb secured to said body portion and enclosing one of said needlepoints, said bulb being constructed of a flexible, transparent materialadapted to be squeezed and released so as to aspirate fluid when theother of said needle points is injected into a patient,

3 and a tubular section in said body portion adjacent said bulb.

.2. A needle assembly according to claim 1,v wherein said tubularsection has side recess means adjacent said bulb for receiving portionsof said bulb.

3. A hypodermic syringe comprising, in combination, a receptacle forcontaining a liquid under pressure to be dispensed therefrom and havingan opening, a closure for said opening constructed of a material adaptedto be pierced by a needle and self-seal the passageway formed by theneedle when the needleis withdrawn, a-

needle assembly arranged for abutting engagement with the closure ofsaid receptacle including a body portion, a hypodermic needleextendingxthrough' said body portion and having a point at each endthereof, a compressible bulb secured to said body. portion and enclosingone of said needle points, said bulb being constructed of. a flexiblematerial'adapted to be pierced by said needle point it encloses andadapted to self-seal the passageway formed by the needle when the needlepoint is withdrawn, whereby, when said needle point enclosed by said{bulb is. caused to pierce said bulb and said closure, liquid is forcedthrough said needle and the flow of liquid is stopped by withdrawing theneedle point from said. closureand said bulb, and a tubular section insaid body portion adjacent said bulb formed with a cup for receiving theend of said receptacle provided with said closure.

4. A syringe according to claim 3, wherein said tubular section hassiderecess meansadjacent said bulb for receiving portions of said bulb.

References Cited in the file of this patent UNITED STATES PATENTS1,752,903 Flagge Apr. 1, 1930 2,531,667 Brent Nov. 28,.1950 2,540,445Harley Feb. 6, 1951 2,554,352 Ward et al. May 22', 1951 2,595,493 Slabyet al. May 6, 1952 2,696,212 Dunmire Dec. 7, 1954 FOREIGN PATENTS950,588 France Sept. 30,.1949 935,122 France Ian. 19, 1948

